Automatic feed and return mechanism for machinery.



E. A. LINDQUIST. AUTOMATIC FEED AND RETURN MECHANISM FOR MACHINERY.

APPLICATION FILED JULY 8,1914. 1,202,297. Patented Oct. 24,1916.

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E. A. LINDQUIST. AUTOMATIC FEED AND RETURN MECHANISM FOR MACHINERY.

APPLICATION FILED JULY 8. I914.

Patented Oct. 24, 1916.

2 SHEETSSHEET 2- INVENTOR. Eric A. Lindquisi:

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UNITED STATES PATENT OFFICE.

ERIC A. LrNDQUIs'r, OF MIDDLETOWN, CONNECTICUT, AssIGivoR row. &3. noUGL'As, F MIDDLETIOWNQCONN'ECTICUT, A CORPORATION or CONNECTICUT.

:AUTOMATIG FEED .AND RETURN MECHANISM FOR MACHINERY.

Application fi1ed J 'ul y s, 1914. Serial No. 849,698.

To all whom it may concern: 4 V

Be it known that 1, Euro A. LIND UIST, a citizen of'the United States, and aresident of Middletown, inthe county of Middle'sex and State of Connecticut, have invented certain new and useful Improvements in Automatic Feed and 'Return Mechanism for Machinery, of which'the following is a Specification. I l

The object of this invention is to provide an eflicient and novel mechanism operating automatically, to feed .a tool to the work upon which it is to operate and'to return it to starting-position after the workhas been completed,and .to continue these operations automatically while the machineis running.

The invention as illustrated is embodied in a drilling machine. It is obvious that mere reversal of the moving parts, that is to say, the workand the tool, could be accomplished by likeorsimilar mechanism.

In the drawingsFigure 1 isa front view of a machine embodyingmy.invention. Fig. 2 is a top viewthereof, with parts broken away to show construction. Fig. 3 is a side view. Fig. f is a detail sectional viewof a portion of the device illustrating the rack and pinion. V H 7 Referring to the drawings, a denotes in general the machine frame, and Z) the vertically reciprocating spindle suitably supported in the overhanging arm a and driven by The spindle has the usual sleeve (Z with a rack cut at the rear to mesh with the pinion 6 carried on the shaft f, the rotation of the shaft either by hand or other means in one direction feeding the spindle down to the work, and in the other direction raising it away from the work.

The mechanism which constitutes the subject matter of this invention provides for automatically turning this shaft f to accomplish the feeding and returning motions of the spindle. This mechanism is supported in a frame 2 connected with the machine frame a by the bracket 3 and supported by the brace 4:, or any other and suitable support for this frame 2 may be provided. This frame has bearings 5, 5, for an extension from the shaft f, and upon this shaft extension between the bearings is mounted a worm wheel 6 which meshes with a worm pinion 7 supported in bearings 8, 8, on the frame, this pinion shaft carrying at its end a pair of bevel gears 9, 10, of different diameters,

.Speificationof Letters Patent.

Patented Oct. 24, 1916.

one of which 9) meshes with a bevelgear 11 at one side, and the other gear .(10) meshes with a bevel gear 12 at its opposite side. The gear 11 is mounted on the shaft 18 which is supported inbearings 14 on the frame 2. The gear 12 is'mounted on a sleeve which is .rotatableonthe shaft 13 and supported ina bearing 16. :To the opposite end of the sleeve 15 from the gear 12 is secured apulley '17, and to the shaft 13issecured a pulleylS. 19is the drivingfbelt for thesepulleys 17, 18, which isadapted to be shiftedfrom one to the other. It will be noted that when the belt is on the pulley 1.7, as; shown in Fig. 2, the bevel gear 12 will drlvethe bevel gear 10, rotating=the shaft of the worm pinion? inone direction, and consequently through the worm wheel 6,shaft and pinion 6, moves the spindle vertically intone direction, while ifthebelt be on the pulley '18 it will drive the shaft 13, and

through the bevelgears 11, 9, worm pinion worm wheel 6, shaft 7, and pinion 6, will move the spindle vertically in the opposite .-23 secured to the spindle. The upper end of the trip rod is secured to the short arm 24: of a bell crank lever pivoted at 25, to the long arm 26 of'which is secured a shipper rod 27 from which project spaced pins 28,

between which there is located a stud 29 on the shipper 30 whose arms 31 embrace the belt.

As the spindle moves down the tripper 23 strikes the trip arm 22, moving the trip rod 20 down and rocking the long arm 26 of the bell crank lever to the right, as seen from the front of the machine in Fig. 1, moving the shipper rod 27 to the right, and causing the shipper 30 to move the belt from the pulley 17 onto the pulley 18, which causes the rotation of the shaft 13, and, as stated above, the vertical movement of the spindle, which as the parts are shown would occasion the raising of the spindle. As soon as the spindle reaches its upper position the tripper 23 strikes the trip arm 21 on the trip rod 20, and through the bell crank lever, shipper rod and shipper, moves the belt back onto the pulley 17, which through the sleeve 'reciprocatory movement, and a rack and pinion'mechanism for producing such movement, of automatically operating means for rotating said pinion shaft in opposite directions,said means comprising two pair of meshinggears, a common shaft on which U one gear ofeach pair is fixedly mounted,

means for separately driving the other gear of each pair, and means for transmitting the power from said common shaft to said pinion shaft each pair of cooperating gears being of a different size to cause'the pinion t0 revolve faster in one direction than in the other.

2. In a machine of the character described, the combination with a member adapted for reciprocatory movement, and a rack and pinion mechanism for producing such movement, of automatically operating means for rotating said pinion shaft in opposite directions, said means comprising two pairs of meshing gears, a common shaft on which one gear of each-pair is'mounted, means for delivering power from said common shaft to said pinion shaft, a shaft upon which the other gear of one pair is mounted, a sleeve upon which the other gear of the second pair is mounted, a driving member common to said shaft and sleeve, a trip rod operatively connected with said driving member, trip arms adjustably mounted on said rod, and a tripper on said reciprocating member with its'end operatively positioned between said trip arms.

3. In a machine of the character described, the combination with a member adapted for reciprocatory movement, and a rack and pinion mechanism for producing such movement, of automatically operating means'for rotating said pinion shaft in opposite directions, said means comprising a worm wheel secured to said pinion shaft, a Worm pinion in mesh with said wheel, a shaft therefor, two pairs of meshing gears, one gear of each pair mounted on said Worm pinion shaft, means for separately driving the other'gear of each pair including a pair of pulleys, one for each gear, a driving belt for said pulleys, a shipper engaging said belt and adapted to shift it from one pulley to the other, a shipper rod operatively connected with said shipper, abell crank lever connected with said shipper rod, a trip rod connected with said bell crank lever, trip arms on said rod, and a tripper on said reciprocating part operatively positioned with respect to'said arms.

ERIC A. 'LINDQUIST.

Witnesses:

EUGENE H. MEAD,

R. B. FLICKINGER.

I I Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latentl, Washington, D. 0. 

